The ornamental design for a building, as shown and described.
FIG. 1 is a perspective view showing the building, obliquely from one side and from above, whereby the portions marked with dash lines forming no part of the design;
FIG. 2 is a front perspective view showing the building from the front side, the opposite rear view of the building being a mirror image thereof, whereby the portions marked with dash lines forming no part of the design; and
FIG. 3 is a side perspective view showing the building obliquely from one side and slightly from above, the opposite side being a mirror image thereof, whereby the portions marked with dash lines forming no part of the design.
FIG. 4 is a front elevation view of the building; and,